CN110737135A - Backlight and electronic equipment - Google Patents

Backlight and electronic equipment Download PDF

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Publication number
CN110737135A
CN110737135A CN201911036457.7A CN201911036457A CN110737135A CN 110737135 A CN110737135 A CN 110737135A CN 201911036457 A CN201911036457 A CN 201911036457A CN 110737135 A CN110737135 A CN 110737135A
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CN
China
Prior art keywords
light
hole
backlight
guide plate
optical assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911036457.7A
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Chinese (zh)
Inventor
徐飙
刘风
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vivo Mobile Communication Co Ltd
Original Assignee
Vivo Mobile Communication Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vivo Mobile Communication Co Ltd filed Critical Vivo Mobile Communication Co Ltd
Priority to CN201911036457.7A priority Critical patent/CN110737135A/en
Publication of CN110737135A publication Critical patent/CN110737135A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention discloses backlight sources, which comprise luminous bodies (140), a supporting frame (110) and an optical assembly (120), wherein the luminous bodies (140) are arranged at side of the optical assembly (120), the optical assembly (120) comprises a light guide plate (121), a diffusion sheet (122) and a brightness enhancement film which are sequentially stacked in the supporting frame (110), the luminous bodies (140) are arranged at the side surface of the light guide plate (121), the optical assembly (120) is provided with an avoiding hole (A) penetrating through the thickness direction of the optical assembly, the part of the supporting frame (110) positioned in the avoiding hole (A) encloses a shooting hole (B), the light guide plate (121) comprises a surface for forming the hole wall of the avoiding hole (A), the area of the surface, which is far away from the luminous bodies (140), is a diffuse reflection area, or a light absorption layer (150) is attached to the area of the surface, which is far away from the luminous bodies (140).

Description

Backlight and electronic equipment
Technical Field
The invention relates to the technical field of communication equipment, in particular to backlights and electronic equipment.
Background
With the increase of user demands, the performance of electronic equipment is more and more optimized. At present, electronic devices are developed towards a larger screen occupation ratio, and how to increase the screen occupation ratio of the electronic devices is a key point of research and development of current electronic device manufacturers.
However, the front camera of the electronic device is usually arranged on the side of the display screen, and therefore occupies a large board space of the electronic device, and finally influences the screen occupation ratio of the electronic device.
It is known that, the light emitted by the light emitting body is arranged at the end of the backlight source, and the opening is arranged at the end of the backlight source, the light projected by the light emitting body is transmitted along the light guide plate of the backlight source and is reflected at the edge of the light guide plate for forming the opening, and as the distance between the edge of the opening formed by the light guide plate and the display area of the liquid crystal display screen is smaller, more reflected light can be seen in the display area, so that the visual light leakage phenomenon of the display area is caused, and the display performance of the electronic device is finally influenced.
Disclosure of Invention
The invention discloses backlight sources and electronic equipment, which are used for solving the problem of light leakage of an opening of the backlight source of the conventional electronic equipment.
In order to solve the problems, the invention adopts the following technical scheme:
kinds of backlight, including luminous body, carriage and optical assembly, the luminous body sets up optical assembly's side, optical assembly is including superpose in proper order light guide plate, diffusion piece and brightness enhancement film in the carriage, the luminous body sets up the side of light guide plate, optical assembly sets up runs through its thickness direction dodge the hole, the carriage is located dodge downthehole position and enclose into and shoot the hole, the light guide plate is including being used for forming dodge the surface of the pore wall in hole, the surface deviates from the region of luminous body is the diffuse reflection region, perhaps, the surface deviates from the regional subsides of luminous body have the light-absorbing layer.
electronic equipment, including display screen and camera, the display screen includes display module and the above backlight, the backlight sets up display module's inboard, display module include with shoot the light transmission area that the hole is relative, the camera lens with shoot the hole and set up relatively.
The technical scheme adopted by the invention can achieve the following beneficial effects:
the backlight source disclosed by the invention implements improvement on the structure of the backlight source in the existing electronic equipment, a diffuse reflection area is arranged in the area, deviating from the luminous body, of the surface of the hole wall of the light guide plate for forming the avoidance hole, or a light absorption layer is attached to the area, deviating from the luminous body, of the surface, and the diffuse reflection area or the light absorption layer can disperse or absorb light projected by the luminous body onto the surface of the hole wall of the light guide plate for forming the avoidance hole through diffuse reflection, so that the light is prevented from being reflected out of the avoidance hole after being reflected by the surface, the edge light leakage of the avoidance hole can be avoided, and the phenomenon of light leakage in vision generated in the display area of the display screen.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and constitute a part of , illustrate embodiments of the invention and together with the description serve to explain the invention without limiting it, and in which:
fig. 1 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present invention;
fig. 2 is a sectional view of a part of the structure of an electronic device disclosed in an embodiment of the present invention;
fig. 3 is an enlarged schematic view of a portion D in fig. 2.
Description of reference numerals:
100-backlight source, 110-support frame, 120-optical component, 121-light guide plate, 122-diffusion sheet, 123-lower brightness enhancement film, 124-upper brightness enhancement film, 125-reflection film, 130-shading band, 140-luminous body, 150-light absorption layer,
200-display component, 210-lower polarizer, 220-liquid crystal panel component, 230-upper polarizer, 240-optical adhesive layer,
300-camera, 310-lens,
400-a light-transmitting cover plate,
500-shell.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer and more complete description of the technical solutions of the present invention will be given below with reference to specific embodiments of the present invention and accompanying drawings.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The embodiment of the invention discloses types of backlight sources 100, and the disclosed backlight source 100 is applied to electronic equipment, the electronic equipment comprises a display screen, the backlight source 100 is a light source part of the display screen, the display screen comprises a display component 200 and the backlight source 100, and the backlight source 100 provides light rays for the picture display of the display component 200, so that the display content of the display component 200 is realized.
Referring to fig. 1-3, a backlight source 100 according to an embodiment of the disclosure includes a light emitter 140, a supporting frame 110, and an optical assembly 120.
The light emitter 140 is a light emitting component of the backlight 100, and the light emitter 140 is disposed at the side of the optical assembly 120. the light emitter 140 is generally an LED light emitter, which has the advantages of low heat generation, low energy consumption, and long lifetime.
The optical assembly 120 is a main body of the backlight 100, and the optical assembly 120 can adjust light emitted from the light emitter 140 to provide light for the display assembly 200. in the embodiment of the present invention, the optical assembly 120 includes a light guide plate 121, a diffusion sheet 122, and a brightness enhancement film sequentially stacked in a support frame 110. in general, the brightness enhancement film includes a lower brightness enhancement film 123 and an upper brightness enhancement film 124 sequentially stacked in a stack manner. the support frame 110 can provide a peripheral protection for the optical assembly 120. the support frame 110 can be a rubber frame or an iron frame. specifically, the light guide plate 121, the diffusion sheet 122, the lower brightness enhancement film 123, and the upper brightness enhancement film 124 are stacked in to form a whole and fixed in the support frame 110.
The light emitting members 140 are disposed at the side of the light guide plate 121, and the light emitting members 140 project light into the light guide plate 121 through the side of the light guide plate 121, and after the light enters the light guide plate 121, the light is transmitted by the light guide plate 121 and finally enters the diffusion sheet 122 through the light guide plate 121. The diffuser 122 can diffuse the light, so that the light finally emitted from the optical assembly 120 is more uniform.
The lower brightness enhancement film 123 and the upper brightness enhancement film 124 can optically process the light passing through the diffuser 122 for brightness enhancement, and the incremental process is prior art and will not be described herein.
In the embodiment of the present invention, the optical assembly 120 is provided with an avoiding hole a penetrating through the thickness direction thereof, a portion of the supporting frame 110 is located in the avoiding hole a, and a portion of the supporting frame 110 located in the avoiding hole a encloses a shooting hole B. The electronic device according to the embodiment of the present invention includes the camera 300, the camera 300 is disposed inside the display screen, and the camera 300 can perform shooting through the shooting hole B.
The light guide plate 121 includes a surface for forming a hole wall of the avoiding hole a, the surface has an -ring structure, an area of the surface away from the light emitter 140 is a diffuse reflection area, or an area of the surface away from the light emitter 140 is attached with a light absorption layer 150. the diffuse reflection area or the light absorption layer 150 can destroy total reflection of light by the surface of the light guide plate 121 for forming the avoiding hole a, thereby preventing light projected by the light emitter 140 from being totally reflected by the surface of the light guide plate 121 for forming the avoiding hole a, and further preventing light leakage caused by the total reflection.
The backlight source 100 disclosed in the embodiment of the present invention improves the structure of a backlight source in an existing electronic device, a diffuse reflection region is disposed in a region of the surface of the hole wall of the light guide plate 121, which is away from the light emitting body 140, where the region is away from the light emitting body 140, or a light absorption layer 150 is attached to the region of the surface, which is away from the light emitting body 140, where the hole wall of the avoiding hole a is formed, the diffuse reflection region or the light absorption layer 150 enables light rays projected by the light emitting body 140 onto the surface of the hole wall of the light guide plate 121, which is used for forming the avoiding hole a, to be dispersed or absorbed through diffuse reflection, so that the light rays reflected by the surface from the avoiding hole a are prevented from being reflected by the surface.
The light absorbing layer 150 may be of various types, and specifically, the light absorbing layer 150 may be an ink layer (e.g., a black ink layer) or a light absorbing film. The embodiment of the present invention does not limit the specific kind of the light absorbing layer 150.
There are various ways to provide the diffuse reflection area on the surface of the hole wall of the light guide plate 121 for forming the avoiding hole a, for example, a diffuse reflection film is provided on the surface of the hole wall of the light guide plate 121 for forming the avoiding hole a. in a more preferred embodiment, the roughness of the diffuse reflection area may be greater than the roughness of other areas of the light guide plate 121, so as to form a diffuse reflection structure.
In the embodiment of the present invention, the optical assembly 120 may further include a reflective film 125, the reflective film 125 is stacked on the side of the light guide plate 121 facing away from the diffusion sheet 122, the reflective film 125 is used for reflecting the light leaking from the light guide plate 121 back to the light guide plate 121 for reuse, thereby improving the utilization rate of the light, and in particular, the reflective film 125 is adhered to the light guide plate 121.
In the embodiment of the present invention, the avoiding hole a may be opened at the end of the optical assembly 120 away from the light emitter 140, in which case, the distance from the avoiding hole a to the light emitter 140 is larger, so as to reduce the adverse effect of the light emitter 140 on the avoiding hole a.
The backlight source 100 disclosed in the embodiment of the present invention may further include a light-shielding strip 130, a gap is formed between the hole wall of the avoiding hole a and the portion of the supporting frame 110 located in the avoiding hole a, the light-shielding strip 130 is respectively bonded to the edge of the brightness enhancement film and the end surface of the top end of the supporting frame 110, and the light-shielding strip 130 covers the gap. The light shielding tape 130 can shield the gap to prevent the gap from being exposed. The end surface of the top end of the support frame 110 refers to an end surface of the support frame 110 facing the light supplement direction of the backlight 100. The light-shielding tape 130 is adhered to the upper brightness enhancement film 124 on the premise that the brightness enhancement film includes the lower brightness enhancement film 123 and the upper brightness enhancement film 124 stacked in this order.
Based on the backlight disclosed by the embodiment of the invention, kinds of electronic equipment are disclosed by the embodiment of the invention, the disclosed electronic equipment comprises a display screen and a camera 300, the display screen comprises a display component 200 and the backlight 100 described in the embodiment, the backlight 100 is arranged on the inner side of the display component 200, the display component 200 comprises a light-transmitting area C opposite to a shooting hole B, and a lens 310 of the camera 300 is arranged opposite to the shooting hole B.
In an embodiment of the present invention, the display assembly 200 may include a lower polarizer 210, a liquid crystal panel assembly 220, and an upper polarizer 230 stacked in sequence, the electronic apparatus further includes a transparent cover 400 attached to the upper polarizer 230 through an optical adhesive layer 240, and an area of the lower polarizer 210, the liquid crystal panel assembly 220, and the upper polarizer 230, which is opposite to the photographing hole B, is a transparent structure. The light-transmissive cover plate 400 can function to shield the display assembly 200. The light-transmissive cover plate 400 is typically a glass cover plate. The liquid crystal panel assembly 220 generally includes a lower glass plate, an upper glass plate, and a liquid crystal layer disposed between the lower glass plate and the upper glass plate. In this case, the lower polarizer 210, the lower glass plate, the liquid crystal layer, the upper glass plate, and the upper polarizer 230 are sequentially stacked, thereby assembling the display module 200.
The electronic device disclosed by the embodiment of the invention comprises a shell 500, wherein the light-transmitting cover plate 400 is fixedly connected with the display screen, and specifically, the light-transmitting cover plate 400 is adhered to the display screen through an optical adhesive layer and covers the display screen. The edge of the transparent cover 400 is bonded to the housing 500, so that the transparent cover 400 and the display screen are integrally mounted on the housing 500.
In order to further improve the shooting effect, in a preferred embodiment, the lens 310 is at least partially located in the shooting hole B. in this case, the lens 310 at least partially extends into the shooting hole B, which can reduce the stacking thickness of the camera 300 and the display screen, thereby facilitating the design of the electronic device toward a thinner direction.
The electronic device disclosed by the embodiment of the invention can be a mobile phone, a tablet computer, an electronic book reader, a game machine, a vehicle-mounted navigator, an intelligent watch and other devices, and the embodiment of the invention does not limit the specific type of the electronic device.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

  1. The backlight source of kinds, its characterized in that, including luminous body (140), carriage (110) and optical assembly (120), luminous body (140) set up side of optical assembly (120), optical assembly (120) are including superposing in proper order light guide plate (121), diffusion piece (122) and brightness enhancement film in carriage (110), luminous body (140) set up the side of light guide plate (121), optical assembly (120) offer run through its thickness direction dodge hole (A), carriage (110) are located dodge the position in hole (A) and enclose into and shoot hole (B), light guide plate (121) are including being used for forming the surface of dodging the pore wall of hole (A), the surface deviates from the region of luminous body (140) is the diffuse reflection region, or, the surface deviates from the region of luminous body (140) is attached to have light-absorbing layer (150).
  2. 2. The backlight of claim 1, wherein the light absorbing layer (150) is an ink layer.
  3. 3. The backlight according to claim 1, wherein the diffuse reflection area has a roughness greater than the roughness of other areas of the light guide plate (121).
  4. 4. The backlight of claim 3, wherein the diffuse reflective area is a frosted surface.
  5. 5. The backlight according to claim 1, wherein the optical assembly (120) further comprises a reflective film (125), the reflective film (125) being superimposed on the side of the light guide plate (121) facing away from the diffuser (122).
  6. 6. The backlight according to claim 1, wherein the avoiding hole (a) opens at an end of the optical assembly (120) facing away from the light emitter (140).
  7. 7. The backlight of claim 1, wherein the brightness enhancement film comprises a lower brightness enhancement film (123) and an upper brightness enhancement film (124) stacked in sequence, the backlight further comprises a light-shielding strip (130), a gap is formed between a hole wall of the avoiding hole (a) and a portion of the supporting frame (110) located in the avoiding hole (a), the light-shielding strip (130) is respectively bonded to an edge of the upper brightness enhancement film (124) and a top end face of the supporting frame (110), the light-shielding strip (130) covers the gap, and the light-emitting body (140) is an LED light-emitting body.
  8. electronic device, characterized in that it comprises a display screen and a camera (300), the display screen comprising a display module (200) and the backlight (100) of any of claims 1-7, the backlight (100) being arranged inside the display module (200), the display module (200) comprising a light-transmitting area (C) opposite to the shooting hole (B), the lens (310) of the camera (300) being arranged opposite to the shooting hole (B).
  9. 9. The electronic apparatus according to claim 8, wherein the display assembly (200) comprises a lower polarizer (210), a liquid crystal panel assembly (220), and an upper polarizer (230) stacked in this order, the electronic apparatus further comprises a light-transmissive cover plate (400) attached to the upper polarizer (230) by an optical adhesive layer (240), and the areas of the lower polarizer (210), the liquid crystal panel assembly (220), and the upper polarizer (230) opposite to the photographing aperture (B) are light-transmissive structures.
  10. 10. The electronic device of claim 8, wherein the lens (310) is at least partially located in the capture aperture (B).
CN201911036457.7A 2019-10-29 2019-10-29 Backlight and electronic equipment Pending CN110737135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911036457.7A CN110737135A (en) 2019-10-29 2019-10-29 Backlight and electronic equipment

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Application Number Priority Date Filing Date Title
CN201911036457.7A CN110737135A (en) 2019-10-29 2019-10-29 Backlight and electronic equipment

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CN110737135A true CN110737135A (en) 2020-01-31

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001006418A (en) * 1999-06-23 2001-01-12 Toshiba Chem Corp Lighting system
US20080319715A1 (en) * 2007-06-22 2008-12-25 Samsung Electronics Co. Ltd. Light guide plate, method of manufacturing the same, and liquid crystal display device including the same
CN104678483A (en) * 2012-05-07 2015-06-03 青岛海信电器股份有限公司 Light guide plate, backlight module and liquid crystal display device
US20160161664A1 (en) * 2013-08-12 2016-06-09 Sharp Kabushiki Kaisha Display apparatus
CN108427228A (en) * 2018-02-24 2018-08-21 武汉天马微电子有限公司 Backlight module and display device
CN207992496U (en) * 2018-02-24 2018-10-19 东莞市银泰丰光学科技有限公司 A kind of glass light guide plate without dark angle
CN109324440A (en) * 2018-11-28 2019-02-12 武汉华星光电技术有限公司 A kind of liquid crystal display panel
CN109445162A (en) * 2019-01-02 2019-03-08 京东方科技集团股份有限公司 Display module and preparation method thereof and display device
CN209460447U (en) * 2019-02-28 2019-10-01 深圳市隆利科技股份有限公司 A kind of backlight module

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001006418A (en) * 1999-06-23 2001-01-12 Toshiba Chem Corp Lighting system
US20080319715A1 (en) * 2007-06-22 2008-12-25 Samsung Electronics Co. Ltd. Light guide plate, method of manufacturing the same, and liquid crystal display device including the same
CN104678483A (en) * 2012-05-07 2015-06-03 青岛海信电器股份有限公司 Light guide plate, backlight module and liquid crystal display device
US20160161664A1 (en) * 2013-08-12 2016-06-09 Sharp Kabushiki Kaisha Display apparatus
CN108427228A (en) * 2018-02-24 2018-08-21 武汉天马微电子有限公司 Backlight module and display device
CN207992496U (en) * 2018-02-24 2018-10-19 东莞市银泰丰光学科技有限公司 A kind of glass light guide plate without dark angle
CN109324440A (en) * 2018-11-28 2019-02-12 武汉华星光电技术有限公司 A kind of liquid crystal display panel
CN109445162A (en) * 2019-01-02 2019-03-08 京东方科技集团股份有限公司 Display module and preparation method thereof and display device
CN209460447U (en) * 2019-02-28 2019-10-01 深圳市隆利科技股份有限公司 A kind of backlight module

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Application publication date: 20200131

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